Welcome.

The RM Group specializes in creating products and services designed to help you perform investigative water penetration and air infiltration testing within the strict guidelines of ASTM, AAMA, WDMA and CSA.

Our products are guaranteed to do their job so you’re free to do yours without the hassles and worries of building and maintaining your own equipment.

The patented design of the Rain Maker spray rack has been helping test engineers, builders, window companies, and others save valuable time and money in the field for five years. See our testimonials page to read the raves that the Rain Maker and our other products have received. We’ve also begun offering full training in our new training center. We’ve provided helpful links such as the standards page to shorten your research time. And the FAQ page has information on standards and real world issues from out in the field you may find helpful.

See the Rain Maker featured in "The Construction Specifier"

See our equipment being used in the field

Helpful Information
How to adjust to AAMA 502 changes            ASTM E1105 issues
Spray Rack Calibration                               Blower Doors & E1105